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[Qemu-devel] [6863] x86: Add NULL check to lsl (Jan Kiszka)
From: |
Anthony Liguori |
Subject: |
[Qemu-devel] [6863] x86: Add NULL check to lsl (Jan Kiszka) |
Date: |
Fri, 20 Mar 2009 16:13:42 +0000 |
Revision: 6863
http://svn.sv.gnu.org/viewvc/?view=rev&root=qemu&revision=6863
Author: aliguori
Date: 2009-03-20 16:13:41 +0000 (Fri, 20 Mar 2009)
Log Message:
-----------
x86: Add NULL check to lsl (Jan Kiszka)
According to the Intel specs, lsl performs a check against NULL for the
provided selector, just like lar does. helper_lar() includes the
corresponding code, helper_lsl() was lacking it so far.
Signed-off-by: Jan Kiszka <address@hidden>
Signed-off-by: Anthony Liguori <address@hidden>
Modified Paths:
--------------
trunk/target-i386/op_helper.c
Modified: trunk/target-i386/op_helper.c
===================================================================
--- trunk/target-i386/op_helper.c 2009-03-20 15:59:24 UTC (rev 6862)
+++ trunk/target-i386/op_helper.c 2009-03-20 16:13:41 UTC (rev 6863)
@@ -3241,6 +3241,8 @@
selector = selector1 & 0xffff;
eflags = helper_cc_compute_all(CC_OP);
+ if ((selector & 0xfffc) == 0)
+ goto fail;
if (load_segment(&e1, &e2, selector) != 0)
goto fail;
rpl = selector & 3;
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